When Obama said, “ WE can do stuff to you “ he was not talking for America but his jihadist at the MBH.
Textbook example of why you don't taunt other nations with vague threats of "doing stuff to you". You never know when a murderous jihadi linked to the government of an allied nation (unfortunately, they are) will execute a high government official of said nation and leave them wondering "wait, what did the US mean about 'doing stuff' to us?"